US4830447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical wavelength conversion device
Assignee: Fujifilm Holdings Corp
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Filing: 1988-02-11
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Granted: 1989-05-16
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Expires: 2008-02-11
Abstract
Abstract An optical wavelength conversion device is composed of an organic nonlinear optical material, and a cladding layer having a refractive index lower than the refractive index of the organic nonlinear optical material and covering the organic nonlinear optical material, thereby to convert a fundamental wave entering the optical wavelength conversion device to a second harmonic, and to radiate the second harmonic. At least one of device edge faces including edge faces of the organic nonlinear optical material is provided with a shielding layer for shielding the device edge face from ambient atmosphere, thereby to prevent the organic nonlinear optical material from sublimation and deterioration.
Inventors
- 👤 Kozi Kamiyama
- 👤 Yoji Okazaki
- 👤 Masaki Okazaki
- 👤 Seiiti Kubodera
- 👤 Syozo Takeuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:50
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/37; G02F1/377; G02F1/383
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
111 words
In an optical wavelength conversion device composed of an organic nonlinear optical material, and a cladding layer having a refractive index lower than the refractive index of the organic nonlinear optical material and covering the organic nonlinear optical material to convert a fundamental wave entering the optical wavelength conversion device to a second harmonic, and to radiate the second harmonic, the improvement comprising providing at least one edge face of the device, including edge faces of said organic nonlinear optical material, with a shielding layer for shielding said device edge face from ambient atmosphere while permitting at least one of said fundamental wave and said second harmonic to be transmitted therethrough.
Claim 2
Dependent Claim
111 words
In an optical wavelength conversion device composed of an organic nonlinear optical material, and a cladding layer having a refractive index lower than the refractive index of the organic nonlinear optical material and covering the organic nonlinear optical material to convert a fundamental wave entering the optical wavelength conversion device to a second harmonic, and to radiate the second harmonic, the improvement comprising providing at least one edge face of the device, including edge faces of said organic nonlinear optical material, with a shielding layer for shielding said device edge face from ambient atmosphere while permitting at least one of said fundamental wave and said second harmonic to be transmitted therethrough.
Claim 3
Dependent Claim
49 words
A device as defined in claim 1 wherein one of the two edge faces opposite to each other among said device edge faces is formed as a fundamental wave entry edge face, and the other of said two edge faces is formed as a second harmonic radiation edge face.
Claim 4
Dependent Claim
28 words
A device as defined in claim 2 wherein at least one of the two shielding layers provided on said device edge faces is formed as a condensing lens.
Claim 5
Dependent Claim
69 words
A device as defined in claim 1 wherein the shielding layer provided on a fundamental wave entry edge face is formed of a material having a refractive index lower than the refractive index of said organic nonlinear optical material, and the shielding layer provided on a second harmonic radiation edge face is formed of a material having a refractive index lower than the refractive index of the cladding material.
Claim 6
Dependent Claim
69 words
A device as defined in claim 2 wherein the shielding layer provided on said fundamental wave entry edge face is formed of a material having a refractive index lower than the refractive index of said organic nonlinear optical material, and the shielding layer provided on said second harmonic radiation edge face is formed of a material having a refractive index lower than the refractive index of the cladding material.
Claim 7
Dependent Claim
69 words
A device as defined in claim 3 wherein the shielding layer provided on said fundamental wave entry edge face is formed of a material having a refractive index lower than the refractive index of said organic nonlinear optical material, and the shielding layer provided on said second harmonic radiation edge face is formed of a material having a refractive index lower than the refractive index of the cladding material.
Claim 8
Dependent Claim
42 words
A device as defined in claim 1 wherein the shielding layer provided on a device edge face from which said second harmonic is to be radiated is formed as a filter layer for transmitting said second harmonic and absorbing said fundamental wave.
Claim 9
Dependent Claim
42 words
A device as defined in claim 2 wherein the shielding layer provided on the device edge face from which said second harmonic is to be radiated is formed as a filter layer for transmitting said second harmonic and absorbing said fundamental wave.
Claim 10
Dependent Claim
42 words
A device as defined in claim 3 wherein the shielding layer provided on the device edge face from which said second harmonic is to be radiated is formed as a filter layer for transmitting said second harmonic and absorbing said fundamental wave.
Claim 11
Dependent Claim
42 words
A device as defined in claim 4 wherein the shielding layer provided on the device edge face from which said second harmonic is to be radiated is formed as a filter layer for transmitting said second harmonic and absorbing said fundamental wave.
Claim 12
Dependent Claim
42 words
A device as defined in claim 5 wherein the shielding layer provided on the device edge face from which said second harmonic is to be radiated is formed as a filter layer for transmitting said second harmonic and absorbing said fundamental wave.
Claim 13
Dependent Claim
42 words
A device as defined in claim 6 wherein the shielding layer provided on the device edge face from which said second harmonic is to be radiated is formed as a filter layer for transmitting said second harmonic and absorbing said fundamental wave.
Claim 14
Dependent Claim
22 words
A device as defined in claim 1 wherein said shielding layer is constituted by a cap-like structure fitted to a device end.
Claim 15
Dependent Claim
22 words
A device as defined in claim 2 wherein said shielding layer is constituted by a cap-like structure fitted to a device end.
Claim 16
Dependent Claim
20 words
A device as defined in claim 3 wherein said shielding layers are constituted by cap-like structures fitted to device ends.
Claim 17
Dependent Claim
20 words
A device as defined in claim 4 wherein said shielding layers are constituted by cap-like structures fitted to device ends.
Claim 18
Dependent Claim
20 words
A device as defined in claim 5 wherein said shielding layers are constituted by cap-like structures fitted to device ends.
Claim 19
Dependent Claim
20 words
A device as defined in claim 6 wherein said shielding layers are constituted by cap-like structures fitted to device ends.
Claim 20
Dependent Claim
22 words
A device as defined in claim 7 wherein said shielding layer is constituted by a cap-like structure fitted to a device end.
Claim 21
Dependent Claim
22 words
A device as defined in claim 8 wherein said shielding layer is constituted by a cap-like structure fitted to a device end.
Claim 22
Dependent Claim
20 words
A device as defined in claim 9 wherein said shielding layers are constituted by cap-like structures fitted to device ends.
Claim 23
Dependent Claim
20 words
A device as defined in claim 10 wherein said shielding layers are constituted by cap-like structures fitted to device ends.
Claim 24
Dependent Claim
20 words
A device as defined in claim 11 wherein said shielding layers are constituted by cap-like structures fitted to device ends.
Claim 25
Dependent Claim
20 words
A device as defined in claim 12 wherein said shielding layers are constituted by cap-like structures fitted to device ends.
Claim 26
Independent Claim
28 words
A device as defined in any of claims 13, 14, 19 and 20 wherein said cap-like structure is formed to cover the overall surface of said cladding layer.
Claim 27
Independent Claim
32 words
A device as defined in any of claims 15, 16, 17, 18, 21, 22, 23 and 24 wherein said cap-like structures are formed to cover the overall surface of said cladding layer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-15 | 1992-11-14 | 1993-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-15 | 1996-11-14 | 1997-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-15 | 2000-11-14 | 2001-05-16 | $7700.00 | Window Closed / Lapsed |